Storage pools can be type random ( disk). We still need to migrate to
cartridge but we have about 13 16GB disk areas set up and allocated to
various storage pools as the primary pools which migrate to tape.
There's no reason, with sufficient space, that you could not hold your
backups on disk, but if you lose the disk you lose the backups.

>>> j.salak AT ASAMER DOT AT 01/09/03 02:52PM >>>
would occasional move data (from disk to disk) not resolve this
fragmentation issue?

regards
juraj Salak


> -----Original Message-----
> From: Joshua Bassi [mailto:jbassi AT IHWY DOT COM]
> Sent: Thursday, January 09, 2003 8:17 PM
> To: ADSM-L AT VM.MARIST DOT EDU
> Subject: Re: TSM Disk Pool Management
>
>
> Unfortunately disk pools with a device class of DISK get
> fragmented and
> will incur a higher overhead penalty the longer they exist
> (without data
> moving off to tape).  I had a customer try this configuration and it
> ended up blowing up in their face.
>
>
> --
> Joshua S. Bassi
> IBM Certified - AIX 4/5L, SAN, Shark
> Tivoli Certified Consultant -ADSM/TSM
> eServer Systems Expert -pSeries HACMP
>
> AIX, HACMP, Storage, TSM Consultant
> Cell (831) 595-3962
> jbassi AT ihwy DOT com
>
> -----Original Message-----
> From: ADSM: Dist Stor Manager [mailto:ADSM-L AT VM.MARIST DOT EDU]
> On Behalf Of
> Andy Carlson
> Sent: Thursday, January 09, 2003 11:09 AM
> To: ADSM-L AT VM.MARIST DOT EDU
> Subject: Re: TSM Disk Pool Management
>
>
> We have given this a little bit of thought also.  You would
> not need to
> use type=file - just enlarge your current disk pool.  Expire will
age
> the files out of there.  The only thing to watch, is for it to be
> getting full, and more disk needs to be added.
>
>
> Andy Carlson                                    |\      _,,,---,,_
> Senior Technical Specialist               ZZZzz /,`.-'`'    -.
;-;;,_
> BJC Health Care                                |,4-  ) )-,_.
> ,\ (  `'-'
> St. Louis, Missouri                           '---''(_/--'  `-'\_)
> Cat Pics: http://andyc.dyndns.org/animal.html
>
>
> On Thu, 9 Jan 2003, Hokanson, Mark wrote:
>
> > We are considering creating an extremely large TSM disk storage
pool
> > (IE: 1-10TB). The goal being to eliminate going to tape. Does
anyone
> > have any really BIG disk pools? Are there tools available
> for managing
>
> > large TSM disk pools over time. (IE: Reclamation, Aging
> Data, etc) The
>
> > documentation from Tivoli suggests that we need to set it up as a
> > device type=FILE. What are the drawbacks using this approach? Is
> > performance dramatically impacted? etc...
> >
> > Thanks in advance,
> >
> > Mark Hokanson
> > Thomson Legal & Regulatory
> >
>